I have 99 jgc 4.0 v6....and the exhaust manifold seems to be leaking but it might be the exhaust it self at the cats...ive heard alot of people say that jeeps are notorius for doing that...i was wondering if anyone has had the same problem and what u did to take care of it?

Well it all depends on how bad the manifold is. In my case it was craked from everywhere. I had my whole exhaust done with a dual flowmaster 40 series and new manifold. Everything for about $500.00. But if your manifold has minor craks on it then it could be fixed. Go to any muffler shop and they will see how bad is it.

Good Luck.